diff --git "a/leetcode3/\354\227\274\355\230\234\354\240\225/3813. Vowel-Consonant Score.java" "b/leetcode3/\354\227\274\355\230\234\354\240\225/3813. Vowel-Consonant Score.java"
new file mode 100644
index 00000000..a2b7f84d
--- /dev/null
+++ "b/leetcode3/\354\227\274\355\230\234\354\240\225/3813. Vowel-Consonant Score.java"	
@@ -0,0 +1,20 @@
+// 97 ~ 122
+// o(n)
+
+class Solution {
+    public int vowelConsonantScore(String s) {
+        Set<Character> vowels = new HashSet<>(List.of('a', 'e', 'i', 'o', 'u'));
+
+        int v = 0;
+        int c = 0;
+        for (char letter : s.toCharArray()) {
+            int askii = (int) letter;
+            if (askii < 97 || askii > 122) continue;
+
+            if (vowels.contains(letter)) v++;
+            else c++;
+        }
+        if (c==0) return 0;
+        return v / c;
+    }
+}